Update Galaxy S3 I9305 to Android 4.3 CM10.2 Custom Firmware

The CyanogenMod unofficial custom firmware based on Android 4.3 Jelly Bean is being tried and tested by many Android users to check out the new features of coming AOSP official ROM based on the latest Android version. This unofficial nightly firmware is an early build of final CM10.2 firmware, hence you might get some bugs. This comprehensive tutorial will guide you in the process of flashing the unofficial CyanogenMod 10.2 nightly build based on Android 4.3 Jelly Bean for Samsung Galaxy S3 I9305 LTE.

Galaxy S3 I9305 LTE must be rooted, unlocked and installed with a recovery tool like TWRP or CWM.

Your device must be charged to at least 60% of power.

Note: this tutorial is specifically focused on Samsung Galaxy S3 I9305 LTE; kindly do not try this guide on other Android & Samsung devices. This guide would be particularly helpful for those who want try the CyanogenMod ROM to see the new features of Android 4.3 JB.

How to update Galaxy S3 I9305 to Android 4.3 CM10.2 custom firmware:

Required files: download the CM 10.2 unofficial custom firmware zip for SGS3 i9305 from here and save it on your computer. Do not extract the contents.